Thermal transport in phase-stabilized lithium zirconate phosphates
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- Yale Univ., New Haven, CT (United States)
- Stanford Univ., CA (United States)
- Univ. of Connecticut, Storrs, CT (United States)
- Univ. of Texas, Austin, TX (United States)
- Hanoi Univ. of Science and Technology, Hanoi (Vietnam)
- Georgia Inst. of Technology, Atlanta, GA (United States)
- Clemson Univ., Clemson, SC (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
The thermal properties of yttrium-stabilized lithium zirconate phosphate [LZP: Li1+x+yYxZr2-x(PO4)3 with x = 0.15, -0.2 ≤ y ≤ 0.4 and with x = 0.0, y = 0.0] are presented over a wide temperature range from 30 to 973 K, elucidating the interplay between structural phase transformations and thermal properties in a solid state superionic conducting material. At room temperature, the thermal conductivity decreases by more than 75% as the stoichiometry is changed from lithium deficient to excess and increases with increasing temperature, indicative of defect-mediated transport in the spark plasma sintered materials. The phase transformations and their stabilities are examined by x-ray diffraction and differential scanning calorimetry and indicate that the Y3+ substitution of Zr4+ is effective in stabilizing the ionically conductive rhombohedral phase over the entire temperature range measured, the mechanism of which is found through ab initio theoretical calculations. Finally, these insights into thermal transport of LZP superionic conductors are valuable as they may be generally applicable for predicting material stability and thermal management in the ceramic electrolyte of future all-solid-state-battery devices.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- Grant/Contract Number:
- 89233218CNA000001; 20190516ECR
- OSTI ID:
- 1716822
- Alternate ID(s):
- OSTI ID: 1637724
- Report Number(s):
- LA-UR-20-24103; TRN: US2204903
- Journal Information:
- Applied Physics Letters, Vol. 117, Issue 1; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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